cla_lin_berr (l) - Linux Manuals

cla_lin_berr: CLA_LIN_BERR compute component-wise relative backward error from the formula max(i) ( abs(R(i)) / ( abs(op(A_s))*abs(Y) + abs(B_s) )(i) ) where abs(Z) is the component-wise absolute value of the matrix or vector Z

NAME

CLA_LIN_BERR - CLA_LIN_BERR compute component-wise relative backward error from the formula max(i) ( abs(R(i)) / ( abs(op(A_s))*abs(Y) + abs(B_s) )(i) ) where abs(Z) is the component-wise absolute value of the matrix or vector Z

SYNOPSIS

SUBROUTINE CLA_LIN_BERR
( N, NZ, NRHS, RES, AYB, BERR )

    
IMPLICIT NONE

    
INTEGER N, NZ, NRHS

    
REAL AYB( N, NRHS ), BERR( NRHS )

    
COMPLEX RES( N, NRHS )

PURPOSE


CLA_LIN_BERR computes component-wise relative backward error from
the formula
 max(i) ( abs(R(i)) / ( abs(op(A_s))*abs(Y) + abs(B_s) )(i) )
where abs(Z) is the component-wise absolute value of the matrix
or vector Z.

Pages related to cla_lin_berr

  • cla_lin_berr (3)
  • cla_gbamv (l) - performs one of the matrix-vector operations y := alpha*abs(A)*abs(x) + beta*abs(y),
  • cla_gbrcond_c (l) - CLA_GBRCOND_C Compute the infinity norm condition number of op(A) * inv(diag(C)) where C is a REAL vector
  • cla_gbrcond_x (l) - CLA_GBRCOND_X Compute the infinity norm condition number of op(A) * diag(X) where X is a COMPLEX vector
  • cla_gbrfsx_extended (l) - computes ..
  • cla_geamv (l) - performs one of the matrix-vector operations y := alpha*abs(A)*abs(x) + beta*abs(y),
  • cla_gercond_c (l) - CLA_GERCOND_C compute the infinity norm condition number of op(A) * inv(diag(C)) where C is a REAL vector
  • cla_gercond_x (l) - CLA_GERCOND_X compute the infinity norm condition number of op(A) * diag(X) where X is a COMPLEX vector